Distributed Databases Which of the following is true concerning a global transaction? The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary. The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS. The required data are at one local site and the distributed DBMS passes the request to only the local DBMS. The required data are at one local site and the distributed DBMS routes requests as necessary. The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary. The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS. The required data are at one local site and the distributed DBMS passes the request to only the local DBMS. The required data are at one local site and the distributed DBMS routes requests as necessary. ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases The problem of concurrency control is more complex in a distributed database. False True False True ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A heterogeneous distributed database is which of the following? The same DBMS is used at each location and data are not distributed across all nodes. A different DBMS is used at each location and data are not distributed across all nodes. A different DBMS is used at each location and data are distributed across all nodes. The same DBMS is used at each location and data are distributed across all nodes. The same DBMS is used at each location and data are not distributed across all nodes. A different DBMS is used at each location and data are not distributed across all nodes. A different DBMS is used at each location and data are distributed across all nodes. The same DBMS is used at each location and data are distributed across all nodes. ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Location transparency allows for which of the following? Users to treat the data as if it is at one location Managers to treat the data as if it is at one location Programmers to treat the data as if it is at one location All of these Users to treat the data as if it is at one location Managers to treat the data as if it is at one location Programmers to treat the data as if it is at one location All of these ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A distributed database can use which of the following strategies? All of these Partially or totally replicated across sites Totally centralized at one location and accessed by many sites Partitioned into segments at different sites All of these Partially or totally replicated across sites Totally centralized at one location and accessed by many sites Partitioned into segments at different sites ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Which of the following is a disadvantage of replication? Reduced network traffic Each transaction may proceed without coordination across the network. If the database fails at one site, a copy can be located at another site. Each site must have the same storage capacity. Reduced network traffic Each transaction may proceed without coordination across the network. If the database fails at one site, a copy can be located at another site. Each site must have the same storage capacity. ANSWER DOWNLOAD EXAMIANS APP
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